Add response handling in app page handler

Author: ijjk

packages/next/errors.json

@@ -703,5 +703,6 @@
   "702": "Invariant: unexpected APP_ROUTE cache data",
   "703": "Route is configured with dynamic = error which cannot be statically generated.",
   "704": "Route is configured with dynamic = error be statically generated.",
-  "705": "Route is configured with dynamic = error that cannot be statically generated."
+  "705": "Route is configured with dynamic = error that cannot be statically generated.",
+  "706": "Invariant: static responses cannot be streamed %s"
 }